ARI-STEVI Vario 448-449
ARI Armaturen
Control Valves

ARI-STEVI Vario 448-449

Pneumatic control valve for precise, modulating regulation of flow, pressure and temperature in demanding process lines.

ModulatingPneumatic ActuatorProcess Control

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Technical Specifications

TypeControl valve, straight-through, screwed seat ring
Nominal sizeDN15–100 / NPS ½"–4"
Pressure ratingANSI 150
Body materialCast steel (SA216 WCB) / stainless (SA351 CF8M)
Temperature range-29 °C to +425 °C
ActuatorPneumatic or electric

Key Features

  • Replaceable seat with reducible Kvs values
  • Optional perforated plug for noise reduction
  • Shaft-guided plug for stable control
  • Compact body with rotatable bonnet traverse
  • Energy-efficient BLDC electric actuator option